Self-cleaning　ceramic　materials　were　prepared　by　coating　photocatalytic　membrane　on　ceramic　matrix.　The　photocatalytic　behavior　of　these　materials　for　degradation　of　oleic　acid　and　sterilization　was　studied　by　using　XRD,　AES,　and　in-situ　reaction　techniques.　The　effect　of　preparation　and　reaction　conditions　including　heating　treatment　and　thickness　for　the　membrane　on　photocatalytic　activity　of　the　self-cleaning　ceramics　was　examined.　The　results　show　that　the　photodegradation　of　oleic　acid　and　sterilization　of　the　self-cleaning　ceramics　are　determined　by　crystal　structure,　particle　size,　and　specific　surface　area　of　the　supported　photocatalyst　membrane.